Borehole Geophone

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Specification

		CDJ-JC	CDJ-QJS
		Velocity borehole geophone series	Sealed borehole geophone series
Frequency (Hz)		4HZ-100HZ optional	4HZ-100HZ optional
Minimum appropriate borehole diameter (mm)		φ50	φ45
Operating temperature (℃)		-25~+55	-25~+55
Size	Diameter (mm)	φ45	φ40
	Length of single probe (mm)	210	150
	Cable length	optional	optional
	Distance between probes	optional	optional
	Weight (kg)	22kg~60kg	20kg~36kg

Feature
Light weight, great waterproof capability and nice resolution.
Optional numbers of channels: 6, 12, 24 and 60.

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